Fireproof flexible cable production process and flexible fireproof cable produced thereby

Abstract

The invention discloses a power transmission line, in particular to a fireproof flexible cable production process and a flexible fireproof cable produced thereby. The fireproof flexible cable production process includes unwinding, straightening, injection molding, coating, cable forming and winding. Straightening setting is first performed, and the cable can be straightened during processing, so that the cable does not have uneven wall thickness during injection molding, the frictional force born by the cable is relatively small during pulling of the cable, and the injection molding is relatively uniform. An insulating layer subjected to injection molding is coated by coating to form a fireproof layer, and a sheath is coated on the outermost surface to form the whole. A single-core coppercore dense inside is adopted, and the copper core cross-section is the transmission cross section of the cable, so that there is no extra space inside the cable, and the weight and the consumable items per unit length of the transmission line can be reduced. Since the secondary stranding of the copper core is not required, twisting is avoided, and the cable is relatively flexible.

Description

technical field [0001] The invention relates to a power transmission line, more specifically, it relates to a production process of a fireproof flexible cable and the produced flexible fireproof cable. Background technique [0002] Fireproof cables are mainly used to work under high temperature conditions and can continue to be used in the event of a fire. At present, there are two kinds of fireproof cables, one is to directly use a layer of copper pipes on the outside to achieve the purpose of fire prevention, and the other is to use inorganic mineral materials as the insulation layer for the theater layer, which has excellent insulation properties. And it has flame retardant effect, so as to achieve the purpose of fire prevention. [0003] The Chinese patent with the notification number CN2904218Y discloses a fireproof cable, which includes a copper core inner conductor, an insulating layer, and a sheath tube. The insulating layer outside the copper core inner conductor i...

AI Technical Summary

Problems solved by technology

However, fireproof cables are currently wound with multiple copper cores, so that the cross-sectional area of ​​the copper core is increased. At this time, the overall cross-sectional area of ​​the cable is larger than the cross-sectional area of ​​its effective power transmission, especially in the production of high-power cables. The corresponding cable diameter will also be very large, which will cause some troubles in its use and needs to be improved

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